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1.Write the balanced chemical reaction for the complete neutralization of diprotic oxalic acid (H2C2O4) with sodium hydroxide.
a. Oxalic acid, like KHP, can be used as a primary standard. A solid sample of oxalic acid was dissolved in water and titrated with a 0.2971 M NaOH(aq) solution. If it required 45.62 mL of the NaOH(aq) solution to neutralize the oxalic acid, what was the mass of the oxalic acid sample?
2.An unknown solid acid is either citric acid or tartaric acid. To determine which acid you have, you titrated a sample of the solid with NaOH(aq).
The reactions are:
citric acid: H3C6H5O7(aq) + 3 NaOH(aq) → 3 H2O(l) + Na3C6H5O7(aq)
tartaric acid: H2C4H4O6(aq) + 2 NaOH(aq) → 2 H2O(l) + Na2C4H4O6(aq)
A 0.956 g sample of the acid requires 29.10 mL of 0.513 M NaOH(aq) for titration to the endpoint. What is the unknown acid?
Identity how the drug works at the synapse. How does it lead to a more normal neurotransmitter function? How does this relieve the symptoms of the disease?
There are reported cases of husbands abandoning wives because of the skin color of a new infant. In some cases, the couple with dark complexions produced
It is desired to compute the global emissions of carbon that resulted from oil and gas production in 1986. Worldwide oil production in 1986 was 5.518*10^7 barrels day^-1 and worldwide gas production in the same year was 6.22*10^13 ft^3 yr^-1.
Predict what would happen if during an accident the periosteum and the muscle were removed from a side of a long bone that is broken.
Describe the different growth habits of Cladophora,Ulva, and Codium. Discuss some of the features that distinguish phylum Anthocerophyta from phylum Hepatophyta.
You cross true-breeding red-flowered plants withtrue-breeding, white-flowered plants, and the F1 are allred-flowered plants. The F2, however, occur in a ratio of 9 red : 6pale purple :
predict the phenotypic ratio (show branch diagram to explain why you predict this ratio), show results and test with Chi square analysis.
1.The hemoglobin levels measure 15g/d. What is the estimated value of the hematocrit? A.45% B.55% C.65% D.35%
Jazz is experiencing a resurgence as of late. The BBC ran a report recently that adults in their early 30's, in Britain,
q1. to set up a link between specific bacterium and skin disease researchers have shown that a bacterium was present in
discuss the means of gas exchange for lophophora.
Fish oil is a common nutritional supplement, often recommended by doctors. Where does it come from?
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